ITEM NAME:Chip unstable NE 555 frequency pulse generator module Y8H3 Chip unstable NE 555 frequency pulse generator module Y8H3 Product name: Modulated pulse generator. Electric construction: 5-12V PCB board size: 29 x 12 mm (L x W) Material: electronic parts, plastic Net Weight: 5 g Package Contents: 1 x generator module pulse Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Net Weight: 5 g.